Advertisement
Published in:
2012 | OriginalPaper | Chapter
Real-Time Persistent Queues and Deques with Logic Variables (Declarative Pearl)
Author : Gerlof Bouma
Published in: Functional and Logic Programming
Publisher: Springer Berlin Heidelberg
Activate our intelligent search to find suitable subject content or patents.
Select sections of text to find matching patents with Artificial Intelligence. powered by
Select sections of text to find additional relevant content using AI-assisted search. powered by
We present a Prolog implementation of real-time persistent queues and double-ended queues. Our implementation is inspired by Okasaki’s lazy-functional approach, but relies only on standard Prolog, comprising of the pure subset plus if-then-else constructs to efficiently implement guards and meta-calls for convenience. The resulting data structure is a nice demonstration of the fact that the use of logic variables to hold the outcome of an unfinished computation can sometimes give the same kind of elegant and compact solutions as lazy evaluation.